In this post, we are going to see how to solve one design pattern challenge. The challenge is what we a simplest way to find out the children elements which belongs to Animals, which belongs to Materials inside the container component. <app-animals>…

Orgial aritial --> Link The problem with Angular 1 DI: Angular 2 DI: Solve the singletons problem: The service you inject to the parent component can be differnet with the one you inject to child component: var injector = ReflectiveInjector.resolveAn…

Previously we have tab-panel template defined like this: <ul class="tab-panel-buttons" *ngIf="tabs"> <li [ngClass]="{selected: tab.selected}" (click)="selectTab(tab)" *ngFor="let tab of tabs;">…

Angular 2 已经正式 Release 了,Thoughtram 已经发布了一系列的文档,对 Angular 2 的各个方面进行深入的阐释和说明. 我计划逐渐将这个系列翻译出来,以便对大家学习 Angular 2 提供一些方便. Getting Started Building a Zippy component in Angular 2 Developing a Tabs component in Angular 2 Angular 2 Template Syntax demystifi…

Conceptual Overview Template(模板): HTML with additional markup (就是增加了新的标记的HTML) Directive(指令): extend HTML with custom attributes and elements (给HTML增加自定义属性和元素) Model(模型): the data shown to the user in the view and with which the user interacts (与用户交互…

(七)理解angular中的module和injector,即依赖注入 时间:2014-10-10 01:16:54      阅读:63060      评论:1      收藏:0      [点我收藏+] 标签:angular的injector   angular的依赖注入 依赖注入(DI)的好处不再赘言,使用过spring框架的都知道.angularjs作为前台js框架,也提供了对DI的支持,这是javascript/jquery不具备的特性.angularjs中与DI相关有angula…

因为工作中实际开发需要,才开始接触angular框架.从当初的比葫芦画瓢,被各种问题.概念折磨摧残,到现在有一定的了解认识,觉得有必要将自己的认识进行简单的总结.不到位的地方还望多多包涵. 1.双向数据绑定 目前业内盛行各种MV**框架,相关的框架不断涌现,而angular就是其中的一种(MVVM).MV**框架其实最核心的问题就是将view层和model分离开来,降低代码的耦合性,做到数据和表现的分离,MVC.MVP.MVVM均有相同的目标,而他们之间的不同就在于如何把model层和view关…

In order to resolve a dependency, Angular’s DI uses type annotations. To make sure these types are preserved when transpiled to ES5, TypeScript emits metadata. In this lesson we’ll explore how the @Injectable decorator ensures metadata generation for…

This lesson discusses when and how to add dependencies, resolved by Angular’s DI, to factory providers. The example used in this lesson builts upon the previous lesson on understanding factory providers. For example, the LoggerProvider need to use Co…

In this lesson, we discuss how and when to use factory providers, to enable dependencies that shouldn’t be available to Angular’s DI. If you have this service: export class LoggerProvider { constructor(enabled: boolean){ if(enabled){ console.log("Log…